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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zotina T., Trofimova E., Bolsunovsky A.
Заглавие : Artificial radionuclides in fish fauna of the Yenisei River in the vicinity of the Mining-and-Chemical Combine (Siberia, Russia)
Место публикации : Radioprotection. - 2011. - Vol. 46, Is. 6 SUPPL. - С. S75-S78. - ISSN 00338451 (ISSN) , DOI 10.1051/radiopro/20116649s
Аннотация: Activities of radionuclides were measured in five species of fish (grayling, dace, crucian carp, pike, cod) sampled in the Yenisei River (Siberia, Russia) in the vicinity of the Mining-and-Chemical Combine (ROSATOM) from 2007 to 2010, with a gamma-spectrometer (Canberra, USA). The analyses of samples of organs and tissues of fish species revealed artificial (46Sc, 51Cr, 54Mn, 58,60Co, 59Fe, 65Zn, 85Sr, 99Mo, 103,106Ru, 137Cs, 141,144Ce) and natural (7Be, 40K) radionuclides in fish organs and tissues, including edible ones. The major percent (up to 80%) of 137Cs and 40K activity occurred in muscles of fish species, which also contained considerable percentages of 60Co (up to 70%) and 65Zn (up to 20%). Seasonal changes in the intake of artificial radionuclides by zoobenthos-feeding fish species (grayling and dace) were recorded and they were followed by an activity concentration increase in internal organs. The dramatic increase in radionuclide intake by grayling coincided with the change of diet source. Hence, the feeding behavior of fish can change the fluxes of artificial radionuclides in the Yenisei River. The most effective diet transfer of a radionuclide from gammarus to grayling (muscles and total body) was recorded for 40K (1.3) and much less effective for artificial nuclides. В© 2011 EDP Sciences.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zotina T., Trofimova E., Dementyev D., Bolsunovsky A.
Заглавие : Transfer of americium-241 from food and water to organs and tissues of the crucian carp *
Место публикации : Radioprotection. - 2011. - Vol. 46, Is. 6 SUPPL. - С. S69-S73. - ISSN 00338451 (ISSN) , DOI 10.1051/radiopro/20116648s
Аннотация: The transfer of transuranium element americium-241 (241Am) from food and water to organs and tissues of freshwater fish (Carassius auratus gibelio, crucian carp) has been investigated in laboratory experiments. The fishes were fed with homogenized biomass of submerged macrophytes labeled with 241Am, through catheter. For the first two days after force-feeding, fishes excreted up to 80% of ingested americium, for four days - 98%. 241Am was registered in internal organs and tissues that had no direct contact with americium (liver, bones, muscles) as early as two days after the feeding and after eight days, when the digestive tract was depurated. Among internal organs, the highest activity concentration was recorded in the liver (up to 427 Bq/kg). Activity concentration in bones (19-31 Bq/kg) was several times higher than in muscles, indicating the affinity of americium to bone tissue. Assimilation of 241Am in organs and tissues of crucian carp from water occurred mainly via the digestive tract too. В© 2011 EDP Sciences.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zotina T.A., Trofimova E.A., Dementiev D.V., Bolsunovsky A.Y.
Заглавие : Accumulation of 241Am by crucian carp from food and water
Место публикации : Doklady Biological Sciences. - 2011. - Vol. 439, Is. 1. - С. 248-252. - ISSN 00124966 (ISSN) , DOI 10.1134/S001249661104017X
Ключевые слова (''Своб.индексиров.''): carassius--cyprinidae--americium--water--animal--animal food--article--carp--ecology--metabolism--physiology--pollutant--radioactive waste--water pollutant--americium--animal feed--animals--carps--ecology--environmental pollutants--radioactive waste--water--water pollutants, radioactive
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kolmakov V.I., Gladyshev M.I., Kravchuk E.S., Chuprov S.M., Anishchenko O.V., Ivanova E.A., Trusova M.Yu.
Заглавие : Species-specific stimulation of cyanobacteria by silver carp Hypophthalmichthys molitrix (Val.)
Место публикации : Doklady Biological Sciences. - 2006. - Vol. 408, Is. 1. - С. 223-225. - ISSN 00124966 (ISSN) , DOI 10.1134/S0012496606030069
Ключевые слова (''Своб.индексиров.''): animal--article--carp--cyanobacterium--growth, development and aging--microbiology--species difference--animals--carps--cyanobacteria--species specificity--cyanobacteria--cyprinus carpio--hypophthalmichthys molitrix--hypophthalmichthys nobilis
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Prokopkin I.G., Gubanov V.G., Gladyshev M.I.
Заглавие : Modelling the effect of planktivorous fish removal in a reservoir on the biomass of cyanobacteria
Место публикации : Ecological Modelling. - 2006. - Vol. 190, Is. 3-4. - С. 419-431. - ISSN 03043800 (ISSN) , DOI 10.1016/j.ecolmodel.2005.05.011
Ключевые слова (''Своб.индексиров.''): biomanipulation--cyanobacteria--ecological mathematical model--viable gut passage--bacteria--biodiversity--biomass--ecosystems--rivers--cyanobacteria--fishes--viable gut passage--ecology--algal bloom--community dynamics--modeling--planktivore--removal experiment--reservoir--bugach reservoir--eastern hemisphere--eurasia--krasnoyarsk [russian federation]--russian federation--world--anabaena--carassius auratus--carassius carassius--cyanobacteria--cyprinus carpio--daphnia--microcystis
Аннотация: In 2002, a "top-down" biomanipulation (reduction of biomass of planktivorous fish Carassius auratus) had been successfully carried out in a small reservoir of the river Bugach (Krasnoyarsk, Russia), after which the cyanobacterial blooming ceased. However, the reservoir ecosystem was absolutely free of Daphnia - the main link of trophic cascade. As supposed, the reduction of blooming was the result of suppression of a direct stimulation effect of planktivorous fish on cyanobacteria, revealed earlier in laboratory experiments. The question arose as to whether the effect of stimulation of cyanobacteria revealed in laboratory may lead to the changes in biomass of cyanobacteria in the reservoir, observed after the biomanipulation. To test this supposition, a mathematical model describing growth of cyanobacteria in the reservoir was developed. The modelling results and field data on biomass of cyanobacteria in summer closely coincided. Modelling calculations showed that direct influence of planktivorous fish could cause the second summer peak of water blooming by Microcystis. On the contrary, removal of crucian carp from the reservoir will not affect the level of water blooming caused by cyanobacteria Anabaena, as this species' growth is not stimulated by fish. В© 2005 Elsevier B.V. All rights reserved.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kolmakov V.I., Gladyshev M.I.
Заглавие : Growth and potential photosynthesis of cyanobacteria are stimulated by viable gut passage in crucian carp
Место публикации : Aquatic Ecology. - 2003. - Vol. 37, Is. 3. - С. 237-242. - ISSN 13862588 (ISSN) , DOI 10.1023/A:1025801326088
Ключевые слова (''Своб.индексиров.''): carassius auratus--cyanobacteria--gut passage--cyanobacterium--growth rate--photosynthesis--russian federation--anabaena--anabaena flos-aquae--aphanizomenon--aphanizomenon flos-aquae--carassius auratus--carassius carassius--cyanobacteria--cyprinus carpio--flos--microcystis--microcystis aeruginosa--planktothrix--planktothrix agardhii
Аннотация: Growth and potential photosynthetic activity of phytoplankton passed through intestine of crucian carp (Carassius auratus) from a small Siberian reservoir were compared with those of phytoplankton taken the directly from the reservoir. The dominant phytoplankton species in the reservoir, Microcystis aeruginosa, showed a significant increase of growth after the passage. Subdominant Planktothrix agardhii also showed an increase in growth rate, while subdominants Anabaena flos-aquae and Aphanizomenon flos-aquae were not stimulated by the gut passage.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gladyshev M.I., Gribovskaya I.V., Ivanova E.A., Moskvichova A.V., Muchkina E.Ya., Chuprov S.M.
Заглавие : Metal Concentrations in the Ecosystem and Around Recreational and Fish-Breeding Pond Bugach
Место публикации : Water Resources. - 2001. - Vol. 28, Is. 3. - С. 288-296. - ISSN 00978078 (ISSN) , DOI 10.1023/A:1010400807660
Аннотация: Data of two field studies were used to analyze the concentrations of Na, K, Ca, Mg, Fe, Mn, Zn, Cu, Al, Cr, Ni, Cd, and Pb in the water, bottom deposits, zoobenthos, fish, and macrophytes of the Pond Bugach and in the soils near the pond. It was established that the majority of metals in the soils and bottom deposits correlate and their concentrations are governed by the universal geochemical factors of the region. The heavy metals were recognized that originate from anthropogenic sources and their concentrations were found to exceed the maximum admissible values for different components of the ecosystem. Five types of heavy metals migration were recognized in the soil-bottom deposits-zoobenthos-fish chain and in macrophytes. Statistically significant difference was found to exist between the concentrations of some heavy metals in the muscles of fish species with different food types (crucian carp and perch) as well as between the correlations of metals. The recorded concentrations were compared with the concentrations of metals measured in the last decade in other limnetic ecosystems in Siberia, Europe, North America, and China.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kolmakov V.I.
Заглавие : Role of Microcystis aeruginosa passing through the digestive tracts of filter-feeding animals in eutrophic water reservoirs (review)
Колич.характеристики :10 с
Коллективы : Federal Targeted Program "Scientific and Scientific-Pedagogical Personnel of an Innovative Russia" [16.740.11.0484]
Место публикации : Contemp. Probl. Ecol.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2014. - Vol. 7, Is. 4. - С. 455-464. - ISSN 1995-4255, DOI 10.1134/S1995425514040052. - ISSN 1995-4263
Примечания : Cited References: 100. - This study was performed at the Siberian Federal University (project "Ecological and Biophysical Mechanisms of the Quality of Production in the Aquatic Ecosystems of the Yenisei River Basin") within the framework of the State Requirement of the Ministry of Education and Science of the Russian Federation for the provision of services (performance of activities), as well as by the Federal Targeted Program "Scientific and Scientific-Pedagogical Personnel of an Innovative Russia" (project no. 16.740.11.0484).
Предметные рубрики: CARP HYPOPHTHALMICHTHYS-MOLITRIX
TILAPIA OREOCHROMIS-NILOTICUS
MUSSEL DREISSENA-POLYMORPHA
BLOOM-FORMING CYANOBACTERIUM
VIABLE GUT PASSAGE
LOW-NUTRIENT LAKES
ZEBRA MUSSEL
PHYTOPLANKTIVOROUS FISH
SELECTIVE FILTRATION
ALGAL COMPOSITION
Ключевые слова (''Своб.индексиров.''): microcystis aeruginosa--viable gut passage--water bloom--planktivorous fish--daphnia--bivalves--eutrophic reservoirs
Аннотация: The foreign and Russian literature devoted to studying the effect of enhancing the growth of colonies of the cyanobacterium Microcystis aeruginosa Kutz em. Elenk. after their passage in a viable state through the digestive tract of filter-feeding aquatic animals (planktivorous fish, daphnia, and bivalves) has been analyzed. The main mechanisms of this effect are considered. Its role in the functioning of eutrophic reservoirs is discussed. The prospects and the need for further studies of the effect of enhancing Microcyctis growth after its viable passage through the digestive tracts of filter-feeding animals are shown for the development of a complete theory of the functioning of aquatic ecosystems.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zotina T.A., Trofimova E.A., Dementyev D.V., Bolsunovsky A.Y.
Заглавие : Bioaccumulation, inter-organ distribution, and retention of waterborne and dietary Am-241 in silver crucian carp
Колич.характеристики :12 с
Место публикации : Toxicol Environ. Chem.: TAYLOR & FRANCIS LTD, 2014. - Vol. 96, Is. 2. - С. 243-254. - ISSN 0277-2248, DOI 10.1080/02772248.2014.941368. - ISSN 1029-0486
Примечания : Cited References: 25
Предметные рубрики: YENISEI RIVER
TELEOST FISH
RADIONUCLIDES
METALS
AMERICIUM
EXPOSURE
ELEMENTS
ASSIMILATION
ELASMOBRANCH
DEPURATION
Ключевые слова (''Своб.индексиров.''): americium-241--assimilation--carassius auratus gibelio--force-feeding
Аннотация: The bioaccumulation of actinide Am-241 from food and water in bodies of freshwater fish (Carassius auratus gibelio, silver crucian carp) has been investigated in laboratory experiments. Homogenized biomass of submerged macrophytes labeled with Am-241 was injected into the fish gullet. Internal organs and tissues of crucian carp could be ranked according to activity concentration of dietary Am-241 after depuration of the digestive tract as follows: liver gonads bones muscles. Accumulation of waterborne Am-241 in internal organs and tissues of crucian carp mainly occurred via the digestive tract. While the concentration of Am-241 in liver of crucian carps decreased during depuration time, its concentration in bones increased indicating slower transfer of Am-241 to skeleton compared to muscles and liver. The retention of dietary Am-241 in the bodies of crucian carp reached 35%-46% of ingested Am-241: 20%-31% was retained in liver, 0.6%-0.8% in skeleton, and 1.4%-2.0% in muscles. The concentration factor of Am-241 from water was 0.4 for the whole body, 0.3 for liver, 0.01 for muscles, and 0.01 for skeleton. Trace amounts of Am-241 were recorded in viscera and muscles of a wild population of silver crucian carp inhabiting a radioactively contaminated part of the Yenisei River.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kolmakov V.I., Gladyshev M.I.
Заглавие : Growth and potential photosynthesis of cyanobacteria are stimulated by viable gut passage in crucian carp
Колич.характеристики :6 с
Место публикации : Aquat. Ecol.: KLUWER ACADEMIC PUBL, 2003. - Vol. 37, Is. 3. - P237-242. - ISSN 1386-2588, DOI 10.1023/A:1025801326088
Примечания : Cited References: 28
Предметные рубрики: FISH
LAKE
BIOMANIPULATION
FOOD
ROACH
RESTORATION
COMMUNITIES
ZOOPLANKTON
MECHANISMS
ALGAE
Ключевые слова (''Своб.индексиров.''): carassius auratus--cyanobacteria--gut passage
Аннотация: Growth and potential photosynthetic activity of phytoplankton passed through intestine of crucian carp (Carassius auratus) from a small Siberian reservoir were compared with those of phytoplankton taken the directly from the reservoir. The dominant phytoplankton species in the reservoir, Microcystis aeruginosa, showed a significant increase of growth after the passage. Subdominant Planktothrix agardhii also showed an increase in growth rate, while subdominants Anabaena flos-aquae and Aphanizomenon flos-aquae were not stimulated by the gut passage.
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Chen S. -F., Vysotski E. S., Liu Y. -J.
Заглавие : H2O-Bridged Proton-Transfer Channel in Emitter Species Formation in Obelin Bioluminescence
Место публикации : J Phys Chem B: American Chemical Society, 2021. - Article in press. - ISSN 15206106 (ISSN), DOI 10.1021/acs.jpcb.1c03985
Аннотация: Bioluminescence of a number of marine organisms is conditioned by Ca2+-regulated photoprotein (CaRP) with coelenterazine as the reaction substrate. The reaction product, coelenteramide, at the first singlet excited state (S1) is the emitter of CaRP. The S1-state coelenteramide is produced via the decomposition of coelenterazine dioxetanone. Experiments suggested that the neutral S1-coelenteramide is the primary emitter species. This supposition contradicts with theoretical calculations showing that the anionic S1-coelenteramide is a primary product of the decomposition of coelenterazine dioxetanone. In this study, applying molecular dynamic (MD) simulations and the hybrid quantum mechanics/molecular mechanics (QM/MM) method, we investigated a proton-transfer (PT) process taking place in CaRP obelin from Obelia longissima for emitter formation. Our calculations demonstrate a concerted PT process with a water molecule as a bridge between anionic S1-coelenteramide and the nearest histidine residue. The low activation barrier as well as the strong hydrogen-bond network between the proton donor and the proton acceptor suggests a fast PT process comparable with that of the lifetime of excited anionic S1-coelenteramide. The existence of the PT process eliminates the discrepancy between experimental and theoretical studies. The fast PT process at emitter formation can also take place in other CaRPs. © 2021 American Chemical Society.
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Chen, Shu-Feng, Vysotski, Eugene S., Liu, Ya-Jun
Заглавие : H2O-Bridged Proton-Transfer Channel in Emitter Species Formation in Obelin Bioluminescence
Колич.характеристики :7 с
Коллективы : Program of Shanghai Institute of Technology [YJ2016-42]; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [21973005, 21911530094]; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [20-04-00085, 19-14-53004]
Место публикации : J. Phys. Chem. B: AMER CHEMICAL SOC, 2021. - Vol. 125, Is. 37. - С. 10452-10458. - ISSN 1520-6106, DOI 10.1021/acs.jpcb.1c03985. - ISSN 1520-5207(eISSN)
Примечания : Cited References:50. - This work was supported by the Program of Shanghai Institute of Technology (no. YJ2016-42), the National Natural Science Foundation of China (21973005 and 21911530094), and the Russian Foundation for Basic Research (20-04-00085 and 19-14-53004).
Предметные рубрики: CHEMILUMINESCENT DECOMPOSITION
FLUORESCENCE-SPECTRA
MECHANISM
QM/MM
Аннотация: Bioluminescence of a number of marine organisms is conditioned by Ca2+-regulated photoprotein (CaRP) with coelenterazine as the reaction substrate. The reaction product, coelenteramide, at the first singlet excited state (S-1) is the emitter of CaRP. The S-1-state coelenteramide is produced via the decomposition of coelenterazine dioxetanone. Experiments suggested that the neutral S-1-coelenteramide is the primary emitter species. This supposition contradicts with theoretical calculations showing that the anionic S-1-coelenteramide is a primary product of the decomposition of coelenterazine dioxetanone. In this study, applying molecular dynamic (MD) simulations and the hybrid quantum mechanics/molecular mechanics (QM/MM) method, we investigated a proton-transfer (PT) process taking place in CaRP obelin from Obelia longissima for emitter formation. Our calculations demonstrate a concerted PT process with a water molecule as a bridge between anionic S-1-coelenteramide and the nearest histidine residue. The low activation barrier as well as the strong hydrogen-bond network between the proton donor and the proton acceptor suggests a fast PT process comparable with that of the lifetime of excited anionic S-1-coelenteramide. The existence of the PT process eliminates the discrepancy between experimental and theoretical studies. The fast PT process at emitter formation can also take place in other CaRPs.
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